Last updated on August 30th, 2023 at 01:44 am
Class 9 Is Matter Around us Pure MCQ
Which of the following statements is true about mixtures?
- a) Mixtures contain only one substance.
- b) Mixtures cannot be separated into pure substances.
- c) Mixtures are homogeneous combinations of different substances.
- d) Mixtures have fixed compositions.
Answer: c) Mixtures are homogeneous combinations of different substances.
What is the major component of a solution called?
- a) Mixture
- b) Compound
- c) Solvent
- d) Solute
Answer: c) Solvent
Which term refers to a homogeneous mixture of two or more substances?
- a) Solution
- b) Compound
- c) Element
- d) Solvent
Answer: a) Solution
How can mixtures be separated into pure substances?
- a) Through chemical reactions
- b) By heating them to high temperatures
- c) By using appropriate separation techniques
- d) Mixtures cannot be separated into pure substances
Answer: c) By using appropriate separation techniques
What is the minor component in a solution called?
- a) Solute
- b) Solvent
- c) Mixture
- d) Compound
Answer: a) Solute
What is the definition of concentration in a solution?
- a) The amount of solute present per unit volume of the solution.
- b) The amount of solvent present per unit mass of the solution.
- c) The ratio of solute to solvent in a solution.
- d) The total mass of the solution.
Answer: a) The amount of solute present per unit volume of the solution.
Which of the following statements is true about suspensions?
- a) Suspensions are homogeneous mixtures.
- b) Suspensions have particles that are too small to be seen with the naked eye.
- c) Suspensions have particles that are visible to the naked eye.
- d) Suspensions are useful in industry but not in daily life.
Answer: c) Suspensions have particles that are visible to the naked eye.
What is the term for heterogeneous mixtures in which the particle size is too small to be seen with the naked eye, but is big enough to scatter light?
- a) Solutions
- b) Compounds
- c) Suspensions
- d) Colloids
Answer: d) Colloids
What are the particles called in a colloid?
- a) Solute
- b) Solvent
- c) Dispersed phase
- d) Dispersion medium
Answer: c) Dispersed phase
